webauthn support?

[Jack Hill]

Hi IceCat folks,

What's the status of webauthn support? When using firefox esr 68 on Debian 
or ungoogled-chromium on GNU Guix, sites that use webauthn seem to work: 
the led color changes on my usb token, I press the button, and the 
webauthn exchange happens. However using icecat 68.2.0-guix0-preview1 
(thanks Mark!), the led on my token never changes color and sites either 
report that step to have failed or say it is not supported by my browser.

Is this a configuration problem on my end? Something that is not yet 
implemented? Does webauthn have freedom issues? Something else?

Best,
Jack